ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,533,279, issued on Jan. 27, was assigned to BEIJING AI-ROBOTICS TECHNOLOGY Co. LTD. (Beijing).

"Cam and non-circular gear pair for unpowered multi-joint synchronous training device, manufacturing method thereof, transmission mechanism using the same, and unpowered multi-joint synchronous training device" was invented by Mei Shuai (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention provides a cam for an unpowered multi joint synchronous training device, wherein the cam has a circular main body, a cam slot is disposed on a first side surface of the circular main body, and a contour of the cam slot is configured such that rotational movem...